Network Security Blog

SD WAN: DMPO(Dynamic MultiPath Optimization):-

SD WAN: DMPO(Dynamic MultiPath Optimization):-

DMPO:-

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(Branch)VCE<========DMPO tunnel=======>VCG's

(Branch)VCE<========DMPO tunnel=======>VCE(HUB)

DMPO functionalities:-

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Continuous Monitoring:-

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1)Automated BW Discovery:-

++runs bw test to nearest VCG, by sending short burst of bi-directional traffic measuring received rate.

++runs b/w VCE---VCG and VCE(branch)-----VCE(HUB)

2)Continuous Path monitoring:-

++It continiously monitors the path by measuring LJP(Latency,Jitter,Packetloss) of every packet b/w two DMPO endpoints for every 100ms.

++when there is no user traffic, an active probe is sent every 100ms.

after 5min. still no user traffic then it sends probe for every 500ms.

DMPO header:- has sequence number and time stamp

this helps to identify lost and out of order packets and caluculates Latency and Jitter.

Dynamic application steering:-

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1)per packet steering:-

DMPO identifies L2 to L7 and per packet steering is done based on Business policy configs.

performs per-packet load balancing, utilizing all available links to deliver all packets

2)BW aggregation:-

--20ms--link1 --->selects as primary since it as 20ms

--60ms--link2 -->

On demand remediation:-

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1)FEC(Forward error correction)

++if any packet is missed, then DMPO endpoint informs to other end to re-transmit the missing packet.

++FEC is enabled in single or multiple links.

++all duplicate packets are discarded and out of order packets are re-ordered at the receiving at before reaching to destination.